======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Fred Astaire'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Can't Tell A Lie (film ' You'll Never Get Rich ')"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '105.313'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '105.313'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1942'
'TIT2' (Title/songname/content description)         "I Can't Tell A Lie (film ' You'll Never Get Rich ')"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Fred Astaire'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.99 dB'
'TXXX:replaygain_track_peak'                        '0.525132'

========================== row from database ==========================
                                              'id'  1516482
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Fred Astaire - I Can_t Tell A Lie (film _ You_ll Never Get Rich _) 27-5-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  prerock-swing
                                        'filesize'  3244015
                                           'mtime'  1620561793
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 Can_t _ You_ll _) 27 5 1942 prerock swing
                                      'tag_artist'  Fred Astaire
                                     'tag_release'  None
                                       'tag_title'  I Can't Tell A Lie (film ' You'll Never Get Rich ')
                                             'bpm'  105.313
                                    'search_title'  'a':6 'can':2 'cant':4 'film':8,9 'get':14 'i':1 'lie':7 'll':11 'never':13 'rich':15 't':3 'tell':5 'you':10 'youll':12
                                   'search_artist'  'astaire':2 'fred':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1942':6 '27':11 '5':12 'can':7 'country':4 'exotica':2 'jazz':1 'll':10 'oldies':3 'prerock':13 'swing':14 't':8 'you':9
                                    'search_combo'  '00oldiepop':22 '1942':23 '27':28 '5':29 'a':6A 'astaire':17B 'can':2A,24 'cant':4A 'country':21 'exotica':19 'film':8A,9A 'fred':16B 'get':14A 'i':1A 'jazz':18 'lie':7A 'll':11A,27 'never':13A 'oldies':20 'prerock':30 'rich':15A 'swing':31 't':3A,25 'tell':5A 'you':10A,26 'youll':12A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
                                        'tag_date'  1942
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561793.0751271  (2021-05-09 14:03:13)
                             'size'  3244015